[OSM-newbies] Creating a cul-de-sac

[Robert Funnell]

On Thu, 31 Jul 2008, Oliver Lewis wrote:

> If there's a large loop at the end, #2 seems correct, but without the
> junction=roundabout. If it's a small area at the end of the road that allows
> cars to turn, put a single node at the end and tag it
> highway=turning_circle.
> see http://wiki.openstreetmap.org/index.php/Tag:highway%3Dturning_circle
>
> noexit is not necessary, as routing software can figure this out.  it's also
> unclear what it means / how to tag if there's a pedestrian or cycle through
> route but it's a cul-de-sac for cars.

Bernd is using the presence of noexit=yes in a consistency check for 
accidentally unconnected ways: 
http://lists.openstreetmap.org/pipermail/dev/2008-June/010645.html

I don't know how widely accepted this usage is. It seems that the 
graphical representation of it would conflict with the graphical 
representation of a turning circle. Perhaps the two should be mutually 
exclusive, and the unconnected-ways check should include a check for 
the presence of a turning circle. Presumably the check automatically 
accounts for the presence of an explicit loop.

- Robert